Keyboard



FIG. 1 is a perspective view of a keyboard;

FIG. 2 is another perspective view of the keyboard of FIG. 1;

FIG. 3 is a top view of the keyboard of FIG. 1;

FIG. 4 is a bottom view of the keyboard of FIG. 1;

FIG. 5 is a left-side view of the keyboard of FIG. 1;

FIG. 6 is a right-side view of the keyboard of FIG. 1;

FIG. 7 is a back view of the keyboard of FIG. 1; and,

FIG. 8 is a front view of the keyboard of FIG. 1.

The broken lines are directed to unclaimed portions and form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 